Celina has a water sample that's contaminated with salt and microorganisms. Which two methods could she use to purify the water?

Which will most likely bring clouds and precipitation that last for several days A. high-pressure area B. cold front C. stationary front D. warm front

6. What is the acceleration of an object that accelerated steadily from rest, traveling 10 m in 10 s?

a certain engine has a second-law efficiency of 85%. During each cycle, it absorbs 480J of heat form a reservoir at 300C and dumps 300J of heat to a cold termperature reservoir. What is the temperature of the cold reservoir?

What percent of sample of AS-198 to decay to 1/8 its original

If there was an airplane that went 2,000 miles in 3.5 hours. Find the average speed

In July 2005, NASA's "Deep Impact" mission crashed a 372-kg probe directly onto the surface of the comet Tempel 1, hitting the surface at 37,000 km/h.

What conversion factor is needed to change from kilometres to meters

What does the law of universal gravitation state?

Estimate the smallest possible period of a satellite in a circular orbit around earth. (mass and radius of earth is 5.98 x 1024 kg and 6.37 x 106 m. the universal gravitational constant g = 6.67 x 10-11 n. m2/kg2.)

What happens along a stationary front? a. Cold air rises over warm air. b. The flow of air is neither toward the warm air mass nor toward the cold air mass. c. Air moves so rapidly upward that hurricanes form. d. Wind stops completely.